:root {
  --color-primary: #c7ff00;
  --color-secondary: #001f3f;
  --color-accent: #c7ff00;
  --color-neutral: #6b7280;
  --color-bg-light: #ffffff;
  --color-bg-dark: #001f3f;
  --color-text-primary: #1f2937;
  --color-text-secondary: #6b7280;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;
  --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto Condensed', 'Arial Narrow', sans-serif;
  --font-heading: 'Roboto Condensed', 'Arial Narrow', sans-serif;
  --text-xs: clamp(0.75rem, 1vw, 0.875rem);
  --text-sm: clamp(0.875rem, 1.2vw, 1rem);
  --text-base: clamp(1rem, 1.4vw, 1.125rem);
  --text-lg: clamp(1.25rem, 2vw, 1.5rem);
  --text-xl: clamp(1.5rem, 2.5vw, 2rem);
  --text-2xl: clamp(1.875rem, 3vw, 2.5rem);
  --text-3xl: clamp(2.25rem, 4vw, 3.5rem);
  --lh-tight: 1.2;
  --lh-normal: 1.5;
  --lh-relaxed: 1.75;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --container-max: 1280px;
  --container-pad: clamp(1rem, 3vw, 2rem);
  --gap-base: 1.5rem;
  --header-h: 80px;
  --footer-h: auto;
  --logo-w: 150px;
  --logo-h: 40px;
  --z-base: 1;
  --z-dropdown: 100;
  --z-nav: 1000;
  --z-modal: 2000;
  --z-tooltip: 3000;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
  --transition-fast: 150ms;
  --transition-base: 250ms;
  --transition-slow: 350ms;
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --border-radius-sm: 0.375rem;
  --border-radius-md: 0.75rem;
  --border-radius-lg: 1.25rem;
}

/* Header */
.dr-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: var(--color-bg-light);
  box-shadow: var(--shadow-sm);
  z-index: var(--z-nav);
}

.dr-header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-base);
}

.dr-header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.dr-header-logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--fw-bold);
  color: var(--color-secondary);
}

.dr-nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.dr-nav-list {
  display: flex;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.dr-nav-link {
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-primary);
  text-decoration: none;
  position: relative;
  padding-bottom: 0.2rem;
  transition: color var(--transition-base) var(--ease-out);
}

.dr-nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-base) var(--ease-out);
}

.dr-nav-link:hover::after,
.dr-nav-link:focus-visible::after {
  width: 100%;
}

/* Burger */
.dr-burger {
  display: none;
  width: 32px;
  height: 32px;
  border-radius: var(--border-radius-sm);
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: var(--color-bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition-fast) var(--ease-out),
    box-shadow var(--transition-fast) var(--ease-out);
}

.dr-burger-line {
  position: relative;
  width: 18px;
  height: 2px;
  background: var(--color-secondary);
  border-radius: 999px;
  transition: transform var(--transition-base) var(--ease-in-out),
    background var(--transition-base) var(--ease-in-out);
}

.dr-burger-line::before,
.dr-burger-line::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--color-secondary);
  border-radius: 999px;
  transition: transform var(--transition-base) var(--ease-in-out),
    opacity var(--transition-base) var(--ease-in-out);
}

.dr-burger-line::before {
  top: -6px;
}

.dr-burger-line::after {
  top: 6px;
}

.dr-header.dr-open .dr-burger-line {
  background: transparent;
}

.dr-header.dr-open .dr-burger-line::before {
  transform: translateY(6px) rotate(45deg);
}

.dr-header.dr-open .dr-burger-line::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile menu */
.dr-mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: var(--color-bg-light);
  box-shadow: var(--shadow-md);
  z-index: var(--z-dropdown);
}

.dr-header.dr-open + .dr-mobile-menu {
  display: block;
}

.dr-mobile-menu-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-sm) var(--container-pad) var(--space-md);
  font-family: var(--font-base);
}

.dr-mobile-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.dr-mobile-nav-link {
  display: block;
  font-size: var(--text-base);
  font-weight: var(--fw-medium);
  color: var(--color-text-primary);
  text-decoration: none;
  padding: 0.4rem 0;
}

/* Footer */
.dr-footer {
  background: var(--color-bg-dark);
  color: var(--color-bg-light);
  padding: var(--space-xl) 0 var(--space-lg);
  font-family: var(--font-base);
}

.dr-footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.dr-footer-top {
  display: grid;
  grid-template-columns: minmax(0, 2fr) repeat(3, minmax(0, 1fr));
  gap: var(--space-lg);
  align-items: flex-start;
}

.dr-footer-brand-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.dr-footer-logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--fw-bold);
  color: var(--color-primary);
}

.dr-footer-disclaimer {
  margin: 0;
  font-size: var(--text-xs);
  line-height: var(--lh-relaxed);
  color: var(--color-neutral);
}

.dr-footer-heading {
  margin: 0 0 var(--space-sm);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-neutral);
}

.dr-footer-nav-list,
.dr-footer-legal-list,
.dr-footer-contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.dr-footer-link {
  font-size: var(--text-sm);
  color: var(--color-bg-light);
  text-decoration: none;
  transition: color var(--transition-fast) var(--ease-out);
}

.dr-footer-link:hover,
.dr-footer-link:focus-visible {
  color: var(--color-primary);
}

.dr-footer-contact-address {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.dr-footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: var(--space-lg);
  padding-top: var(--space-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
}

.dr-footer-meta {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-neutral);
}

/* Responsive layout */
@media (max-width: 767px) {
  .dr-nav {
    display: none;
  }

  .dr-burger {
    display: flex;
  }

  .dr-footer {
    padding-top: var(--space-lg);
  }

  .dr-footer-top {
    grid-template-columns: minmax(0, 1fr);
  }

  .dr-footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (min-width: 768px) {
  .dr-nav {
    display: flex;
  }

  .dr-burger {
    display: none;
  }

  .dr-mobile-menu {
    display: none !important;
  }
}